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Position detector

A detector and detection object technology, which is applied in the direction of instruments, measuring devices, electrical devices, etc., can solve problems affecting the stability of vehicle systems

Inactive Publication Date: 2010-02-24
KK TOKAI RIKA DENKI SEISAKUSHO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This affects the stability of the vehicle system

Method used

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Embodiment Construction

[0038] In the figures, the same reference numerals are used for the same elements throughout.

[0039] will now refer to Figure 4-11 A first embodiment of the position detector according to the present invention will be described. In this first embodiment, the position detector is included in the rotation angle detector 11 which detects the steering angle of the steering wheel.

[0040] like Figure 4 As shown, the rotation angle detector 11 is mounted on a steering rod 12 connected to a steering wheel (not shown) so as to rotate together with the steering wheel. The rotation angle detector 11 includes a hollow housing 13 fixed to a structure such as a steering column (not shown) so as to extend around the steering rod 12 . The housing 13 accommodates a main drive gear 14, which is fitted to the steering rod 12 so as to be rotatable together with the steering rod 12, and rotatably supports a first driven gear 15 and a second driven gear 15 meshing with the main drive gear ...

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Abstract

A position detector includes a magnet which moves in cooperation with movement of a detection subject. A magnetic sensor detects magnetic flux generated from the magnet and outputs first and second detection signals from two output terminals. A signal processing circuit differentially amplifies the detection signals to generate an analog signal. A control unit calculates movement of the detectionsubject based on the analog signal. An abnormality detection circuit includes a switching element which connects one of the output terminals of the magnetic sensor to ground. The control unit determines an abnormality in the magnetic sensor and the signal processing circuit by comparing the voltage level of the analog signal with a predetermined determination level, which is the voltage level of the analog signal when the first switching element is activated during normal operation of the magnetic sensor and the signal processing circuit.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims priority from Japanese Priority Application No. 2008214454 filed on August 22, 2008, the contents of which are incorporated herein by reference. technical field [0003] The present invention relates to a position detector for detecting the position of a detection object. Background technique [0004] Currently, vehicles include various systems to improve driving stability, such as vehicle stability control systems and / or electronically controlled suspension systems. These systems perform control to stabilize vehicle operation based on the steering angle of the steering wheel. For this aspect, a turning angle detector is incorporated in the steering column of the vehicle to detect the turning angle of the steering wheel. Such a rotation angle detector may be of an absolute angle detection type that detects an absolute value of a steering angle. [0005] Japanese Patent Applic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/00G01B7/30B62D15/02
CPCG01D5/145G01D2205/28
Inventor 近藤诚二
Owner KK TOKAI RIKA DENKI SEISAKUSHO